<template>
	<view class="u-wrap">
		<!-- 搜索框 -->
		<view class="u-search-box">
			<view class="u-search-inner gradient-bg">
				<u-icon name="search" color="#ffffff" :size="28"></u-icon>
				<text class="u-search-text">搜索商品</text>
			</view>
		</view>

		<!-- 分类菜单 -->
		<view class="u-menu-wrap">
			<!-- 左侧分类 -->
			<scroll-view scroll-y scroll-with-animation 
				class="u-tab-view menu-scroll-view" 
				:scroll-top="scrollTop"
				:style="{height: 1000 + 'px'}">
				<view v-for="(item,index) in tabbar" 
					:key="index" 
					class="u-tab-item" 
					:class="[current==index ? 'u-tab-item-active' : '']"
					@tap.stop="swichMenu(index)">
					<text class="u-line-1">{{item.cname}}</text>
					<view class="active-indicator"></view>
				</view>
			</scroll-view>

			<!-- 右侧内容 -->
			<block v-for="(item,index) in tabbar" :key="index">
				<scroll-view scroll-y 
					class="right-box" 
					v-if="current==index"
					:style="{height: 1000 + 'px'}">
					<view class="page-view">
						<view class="class-item">
							<view class="item-title">
								<text>{{item.cname}}</text>
							</view>
							<view class="item-container grid-layout">
								<view class="thumb-box" 
									v-for="(item1, index1) in item.goodsList" 
									:key="index1"
									@click="toDetail(item1)"
									>
									<!-- @click="handleGoodsClick(item1)" -->
										<u-image 
										   :src="baseUrl+'/'+item1.gimg.split(',')[0]" 
										   width="155rpx"
										   height="155rpx" 
										   margin="10px"
										   mode="aspectFill"
										 ></u-image>
									<view class="item-menu-name" >{{item1.gname}}</view>
								</view>
							</view>
						</view>
					</view>
				</scroll-view>
			</block>
		</view>
	</view>
</template>


<script>
	import {getCategoryGoods} from "@/api/category";
	import { API_BASE_URL } from '@/utils/appConfig'
	export default {
		data() {
			return {
				tabbar:{},
				scrollTop: 0, //tab标题的滚动条位置
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				baseUrl:API_BASE_URL,
			}
		},
		computed: {
			
		},
		onLoad(){
			this.getcategorylist();
		},
		methods: {
			getImg() {
				return Math.floor(Math.random() * 35);
			},
			getcategorylist(){
				getCategoryGoods({isshow:1}).then(res=>{
					console.log(res.data.rows);
					this.tabbar = res.data.rows;
				})
			},
			// 点击左边的栏目切换
			async swichMenu(index) {
				if(index == this.current) return ;
				this.current = index;
				// 如果为0，意味着尚未初始化
				if(this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},
			toDetail(item){
				console.log(item.gid);
				uni.$u.route('pages/detail/detail',{id:item.gid})
			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({size: true},res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if(!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return ;
						}
						this[dataVal] = res.height;
					}).exec();
				})
			}
		}
	}
</script>

<style lang="scss" scoped>
	.u-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}
	.item-menu-name {
	  white-space: nowrap; /* 防止文字换行 */
	  display: block;      /* 或 inline-block，根据布局需要 */
	  overflow-x: auto;    /* 如果文字过长，允许横向滚动（可选） */
	}

	.u-search-box {
		padding: 18rpx 30rpx;
	}

	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color:black;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}
	
	.u-tab-item-active {
		position: relative;
		color: #000;
		font-size: 30rpx;
		font-weight: 600;
		background: #fff;
	}
	
	.u-tab-item-active::before {
		content: "";
		position: absolute;
		border-left: 4px solid #2979ff;
		height: 32rpx;
		left: 0;
		top: 39rpx;
	}

	.u-tab-view {
		height: 100%;
	}
	
	.right-box {
		background-color: rgb(250, 250, 250);
	}
	
	.page-view {
		padding: 16rpx;
	}
	
	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		padding: 16rpx;
		border-radius: 8rpx;
	}
	
	.item-title {
		font-size: 26rpx;
		color:#303133;
		font-weight: bold;
	}
	
	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color:#303133;
	}
	
	.item-container {
		display: flex;
		flex-wrap: wrap;
	}
	
	.thumb-box {
		width: 33.333333%;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}
	
	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}
	
	
////4544654;
	.u-wrap {
		background: #ff007f;
		min-height: 100vh;
	}
	
	/* 搜索框样式 */
	.u-search-box {
		padding: 20rpx 30rpx;
		background: #ffffff;
		box-shadow: 0 4rpx 12rpx rgba(0,0,0,0.04);
		
		.gradient-bg {
			background: #f0f0f0;
			border-radius: 50rpx;
			padding: 20rpx 30rpx;
			display: flex;
			align-items: center;
		}
		
		.u-search-inner {
			.u-search-text {
				color: rgba(255,255,255,0.8);
				font-size: 28rpx;
				margin-left: 20rpx;
			}
		}
	}
	
	/* 分类菜单容器 */
	.u-menu-wrap {
		display: flex;
	}
	
	/* 左侧分类导航 */
	.menu-scroll-view {
		width: 200rpx;
		background: #ffffff;
		
		.u-tab-item {
			height: 100rpx;
			padding: 0 20rpx;
			display: flex;
			align-items: center;
			justify-content: center;
			font-size: 28rpx;
			color: #666;
			position: relative;
			transition: all 0.3s;
			
			&.u-tab-item-active {
				color: #ff6b6b;
				font-weight: bold;
				background: #fff5f5;
				
				.active-indicator {
					position: absolute;
					left: 0;
					height: 40rpx;
					width: 6rpx;
					background: #ff6b6b;
					border-radius: 0 6rpx 6rpx 0;
				}
			}
		}
	}
	
	/* 右侧内容区 */
	.right-box {
		flex: 1;
		background: #ffffff;
		padding: 20rpx 0 0 20rpx;
		
		.item-title {
			font-size: 32rpx;
			font-weight: bold;
			color: #333;
			padding: 20rpx 0;
			border-bottom: 2rpx solid #f0f0f0;
			margin-bottom: 30rpx;
		}
		
		.grid-layout {
			display: grid;
			grid-template-columns: repeat(3, 1fr);
			gap: 20rpx;
			padding-right: 20rpx;
		}
		
		.thumb-box {
			text-align: center;
			transition: transform 0.2s;
			
			&:active {
				transform: scale(0.95);
			}
		}
		
		.item-menu-image {
			width: 100%;
			height: 200rpx;
			border-radius: 12rpx;
			box-shadow: 0 4rpx 12rpx rgba(0,0,0,0.08);
		}
		
		.item-menu-name {
			font-size: 24rpx;
			color: #666;
			margin: 15rpx 0;
			padding: 0 10rpx;
			line-height: 1.4;
		}
	}
	
	
</style>
